CN201078575Y - Safety valve for gas automatic closing - Google Patents
Safety valve for gas automatic closing Download PDFInfo
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- CN201078575Y CN201078575Y CNU2007201254778U CN200720125477U CN201078575Y CN 201078575 Y CN201078575 Y CN 201078575Y CN U2007201254778 U CNU2007201254778 U CN U2007201254778U CN 200720125477 U CN200720125477 U CN 200720125477U CN 201078575 Y CN201078575 Y CN 201078575Y
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Abstract
A gas automatic closedown safety valve is provided, which automatically closes down the valve through the difference of the normal pressure during transmitting gas and the abnormal pressure in accident. The utility model is characterized in that: the safety valve comprises a lower valve body, an upper valve body, a starting valve, a closing valve, a release valve and an accessory detector; wherein, the lower valve body is linked with a gas pipe line and the upper valve body is combined on the lower valve body; a stopping baffle is combined at lower part before side and the starting valve is combined at upper part before side; a cylinder is internally provided with a cylinder sleeve; a piston rod of a piston enters downward into an air chamber from the cylinder to combine with a membrane; a spring is arranged at lower top end. A close valve is arranged in the middle of the upper valve body; the cylinder above is nested with the cylinder sleeve and is internally provided with a piston; the piston rod passes backward through a press screw and props to the upper end of a lever. The middle part of the lever is connected with the upper valve body and the angle of the lever at lower end is pressed on the valve baffle which is connected with the upper valve boy. The release valve is combined on a rear cover; a cone body is combined on a screw in the valve body, one end of which is connected with a rotating wheel shaft and another end of which is pressed tightly with a screw cover combined on the valve body. The rotating wheel is combined on the rotating wheel shaft. When in use, the detector combines with the cover plate at top of the starting valve, thus having simple structure and convenient utilization; besides, the utility model is able to close down the gas resources automatically at the first time once accident occurred in pipelines, so as to reduce the accident lose and prevent the lose from expanding.
Description
Technical field:
The utility model relates to the safety installations of (the perhaps conveying of other harmful gases) in a kind of gas pipeline delivery of fuel gas process, belongs to the safety fittings in gas supply pipe network technology field.
Technical background:
Along with the raising of people's lives, also increasing to the dependence of combustion gas, pipeline network construction more and more widely, the therefore unexpected accident that takes place also increases thereupon, causes unnecessary loss for the country and people's lives and properties.
Summary of the invention:
The purpose of this utility model provides a kind of gas station outlet that is installed in, the source of big-and-middle-sized pipe network, midway and the bifurcation of urban pipe network and the pipe network terminal region before registering one's residence, perhaps domestic gas jar outlet, can be in the combustion gas course of conveying, during sudden accidents such as the pipeline accident is leaked, fracture, in the very first time, close the automatic closed safe valve of combustion gas of source of the gas (that is: close upstream, place where the accident occurred source of the gas and, and close the source of the gas before entering the room during indoor meeting accident) automatically from the return-air in downstream, place where the accident occurred.
The purpose of this utility model is realized by following technological scheme.
The automatic closed safe valve of combustion gas is by body, upper body, starter gate valve, cut-off valve, bleed valve and annex detector are formed down.
Following body two ends connect with gas pipeline, and front end is closed mutually with the non-return baffle plate, as to be used to prevent fuel gas return-flow tapered close mouth.There is the U type aditus laryngis less than pipeline drift diameter the intermediate portion.There is the sealing surface that matches with the valve plate washer at the rear portion of aditus laryngis, and the air flue that leads to ram is arranged at the top of sealing surface.There is anti-aeration plate in aditus laryngis the place ahead, and there is the fixed angles of the fixing spring that stretches out the anti-aeration plate below.
With following body sealed attachment, be the main body that each parts is installed below the upper body, there is non-return baffle plate engaging lug the front lower place, and the top is a starter gate valve, and the top of starter gate valve is useful on the detection maintenance hole of detecting and maintaining usefulness.The top of upper body is promising closes the ram that source of the gas provides power, and there is the air flue that leads to starter gate valve the front of ram.The rear of upper body is combined with bonnet, and bleed valve is arranged on the bonnet.The engaging lug that connects lever and valve plate washer is arranged in the upper body abdominal cavity.
Starter gate valve is the valve that source of the gas is provided for ram, and it is made up of cylinder, cylinder sleeve, piston, piston sleeve, diaphragm, spring.Stud with cylinder sleeve in the cylinder, between cylinder sleeve cylindrical and the cylinder body air flue is arranged, there is the air flue that leads to the cut-off valve cylinder upper end, and the promising cut-off valve cylinder in middle part provides the air flue of power.The piston rod of piston lower end leads to air chamber and combines with diaphragm, air chamber separates with diaphragm, the below is a lower chamber, the top is a upper gas chamber, an air flue is respectively arranged before and after in the upper gas chamber, the air flue of back leads to the anti-aeration plate back, and the air flue of front leads to the venting road of front, and a side of this air flue has the adjustment screw of the tolerance of adjusting.Piston upper end studs with piston sleeve, and there is spring on the top under the piston rod, and spring withstands on the fixed angles that anti-aeration plate stretches out.
Cut-off valve be for close source of the gas provide the starting power cylinder, form by cylinder sleeve, piston, piston sleeve, piston rod, pressure spiral shell, lever, spigot baffle, non-return baffle plate, stud with cylinder sleeve in the cylinder, piston studs with piston sleeve outward, the piston sleeve cylindrical has the three seals groove, piston rear end is combined with the piston rod of dribbling head with pressing plate, and piston rod passes the pressure spiral shell that is cast with bearing metal in the hole, and tail end withstands in the ball-type groove of lever upper end.In the middle of the lever support axis hole is arranged, be supported on bearing pin on the engaging lug of upper body, there is bent angle the lower end of lever, and bent angle is pressed on the slideway of valve plate washer, and the engaging lug of lever is connected with the bleed valve taper with chain.
The valve plate washer is combined on the engaging lug of upper body, and slideway and the grab that is used for fixing spigot baffle are arranged above, and grab combines with trip and is used for fixing the valve plate washer.The non-return baffle plate is combined on the engaging lug of upper body front end.
Bleed valve is the valve when being used for that after pipeline rehabilitation the combustion gas of upstream put into the downstream, treats that pressure opens the automatic closed safe valve of combustion gas after in a basic balance automatically.Bleed valve is combined in thread seal on the bonnet of upper body window, is made up of valve body, taper, runner shaft, gland, runner, has in the valve body when closing combustion gas and the closed mutually conical surface of cone body, and the cone body screw thread combines with the valve body internal thread.There is runner shaft the rear end, and the rectangular plate of runner shaft is inserted in the rectangle groove of taper, on the axle O RunddichtringO is arranged, and runner shaft adds sealing gasket with blind nut and is fixed on the valve body, and afterbody has runner.The lug of valve body and venting road lug sealed attachment.
The annex detector is the detection utensil that is used for detecting the automatic closed safe valve performance of combustion gas, and it is made up of sleeve, screw rod, blind nut.Sleeve combines with the detection hole of starter gate valve during use, and the screw thread of screw rod one end combines with the screw of starter gate valve piston tip, has piston, the other end that the scale of measuring the starter gate valve spring is arranged in the middle of the screw rod, and there is handle on the top.
The automatic closed safe valve of above-mentioned combustion gas combines with upper body above the described down body, two ends respectively with the gas pipeline sealed attachment.The tapered close mouth that preceding lower end has and the non-return baffle plate is closed mutually, close mouth back be, the O type cavity that two ends are identical with gas pipeline, and the centre is the U type cavity that is formed gradually inwards by two ends O type.There is the U type aditus laryngis less than pipeline drift diameter the centre, and the aditus laryngis back has and the closed mutually sealing surface of valve plate washer.Have in the groove of sealing surface and lead to the intake duct that ram and upper body match.The aditus laryngis front end has anti-aeration plate, and there is the fixed angles of fixing spring the anti-aeration plate lower end.
The automatic closed safe valve of above-mentioned combustion gas, described starter gate valve is combined in the upper body, be that a cover reaches two the air chamber component devices up and down that are separated into by diaphragm by cylinder, cylinder sleeve, piston, piston sleeve, diaphragm, spring, air flue, diaphragm, during pistons work in cylinder axial-movement, piston studs with piston sleeve outward, respectively there is the two seals groove at piston sleeve cylindrical two ends, and the piston lower end is the piston rod that appearance has corrosion resistant coating.Piston rod passes the hole that is cast with bearing metal and arrives air chamber, and check ring is stuck in the circlip groove of piston rod, the position that the limited piston bar makes progress.The piston rod tail end be combined in the diaphragm that between the body air chamber is divided into up and down lower chamber and combine.There is spring on the top, and the other end of spring withstands on the fixed angles of stretching out under the anti-aeration plate.Cylinder sleeve is arranged in the cylinder, and there is the air flue that leads to ram the upper end, and air flue that leads to the cylinder lower end and the air flue that is led to the road of exitting again by the lower end are arranged between cylinder body and the cylinder sleeve.Lead in the air flue in the road of exitting and stud with sleeve, the steel ball and the spring that prevent return-air when detecting are arranged in the sleeve, the outer end compresses with the pressure spiral shell.The cylinder stage casing has leads to the air flue that power is provided for ram in the aditus laryngis sealing surface groove.The top is for the detection maintenance hole of detecting and maintaining.Upper gas chamber has the airway pressure of leading to the anti-aeration plate back, and this air flue also can be to lead to the air flue that power is provided for ram.The opposite side of upper gas chamber has the air flue that leads to the road of exitting, and a side of this air flue has the adjustment screw of the tolerance of adjusting, and is used for adjusting the pressure of upper gas chamber.
The automatic closed safe valve of above-mentioned combustion gas, described cut-off valve is the critical piece that cuts off source of the gas, form by cylinder, piston, piston rod, pressure spiral shell, lever, spigot baffle, non-return baffle plate, cylinder and piston are the initial power resources of throttle down plate washer, stud with cylinder sleeve in the cylinder, piston is made axial-movement in cylinder sleeve.Outside piston studs with piston sleeve, and the cylindrical of piston sleeve has the three seals groove, and the piston rod that the dribbling head of the useful pressing plate combination in rear end, appearance have coating for protection against corrosion, piston rod pass the pressure screw that is combined in the cylinder body rear portion, withstands in the ball-type groove of lever upper end.Be cast with bearing metal in the groove of pressure screw, be slidingly connected with piston rod.Cushion rubber bumper when pressing the spiral shell front end to be useful on piston to put in place, the seal ring that the useful little pressure spiral shell in rear end compresses.The front end of cylinder has the air flue that leads in the startup valve barrel, and the rear end has eliminates the air flue that piston rear portion pressure leads to the road of exitting.Being connected between lever upper end and the piston rod can also be to flexibly connect with bearing pin.Do support with bearing pin in the middle of the lever and be connected with the engaging lug of upper body, the bent angle of lever lower end is pressed on the slideway of valve plate washer.The engaging lug of lever back is connected with the bleed valve cone body with chain.The valve plate washer is connected with the valve plate washer engaging lug of upper body bottom with bearing pin, and torsion spring is combined on the bearing pin.U type aditus laryngis sealing surface with following body during the work of valve plate washer forms closure, closes source of the gas.Be combined with seal rubber pad with the closed place of U type aditus laryngis with dovetail groove on the valve plate washer, another side has the slideway that matches with the bent angle of lever and the grab of fixed valve plate washer, and grab cooperates the fixed valve plate washer with trip on the upper body.The non-return baffle plate is connected with the engaging lug of upper body with bearing pin, and bearing pin is fixed with check ring.There is sealing gasket at tapered mouthful of closed place of the conical surface of non-return baffle plate and following body, the tapered mouthful of combustion gas that closed amputation refluxes of the conical surface of non-return baffle plate and following body during work.
The automatic closed safe valve of above-mentioned combustion gas, described bleed valve is combined in thread seal on the bonnet of upper body window, is made of the lug of valve body and venting road lug sealed attachment valve body, taper, runner shaft, gland, runner.Have in the valve body when closing combustion gas and the closed mutually conical surface of cone body, the cone body screw thread combines with the valve body internal thread.There is runner shaft the rear end, and the rectangular plate of runner shaft is inserted in the rectangle groove of taper.On the axle O RunddichtringO is arranged, runner shaft adds sealing gasket with blind nut and is fixed on the valve body, and afterbody has runner.
The automatic closed safe valve of above-mentioned combustion gas, described annex detector, in use, the detection of top blind nut maintenance hole connects on sleeve threaded one end and the starter gate valve.Screw rod is arranged in the sleeve, and an end of screw rod has screw thread, and screw thread connects with top screw on the starter gate valve piston, and there is piston the centre, and the other end has scale and the handle that detects usefulness.
The automatic closed safe valve of above-mentioned combustion gas, described starter gate valve can also be parallel with ram, adopts parallel placement can reduce whole height, and air chamber when adopting parallel placement the and spring are in the place ahead of upper body, and the front end of spring is combined with the adjustment spiral shell.
The automatic closed safe valve of above-mentioned combustion gas, the device that described starter gate valve upper gas chamber and diaphragm can be made up of cylinder and piston, when taking cylinder and piston, piston rod passes the back at piston center hole and fixes with nut.Spring is the lower end in the starter gate valve cylinder.Take that the lower end can deduct the influence of fixed angles to air-flow in conjunction with spring in the starter gate valve cylinder.
The automatic closed safe valve of above-mentioned combustion gas, described starter gate valve spring is in the upper gas chamber of diaphragm top, starter gate valve piston lower end is tapered, push rod one end withstands on the tapered inclined-plane, the other end withstands on the upper end of lever, the lever lower end is through in the groove at trip middle part, and trip one end has spring, and the other end blocks spigot baffle.Establishing spring can save to throttle down and cylinder, the starter gate valve cylinder of power is provided and is located at everywhere air flue in the diaphragm top.It is that spring is upheld when air pressure is reduced to specified minimum, and piston rod is freed trip downwards and decontroled spigot baffle, throttle down.
The automatic closed safe valve of above-mentioned combustion gas, the cylinder sleeve of described cut-off valve and starter gate valve can be the coating at inner surface of cylinder block plating one deck corrosion resistant.Adopt the cylinder barrel of corrosion-resistant coating, lead to the air flue of below in casing wall by the top between starter gate valve cylinder barrel and the cylinder sleeve.
The automatic closed safe valve of above-mentioned combustion gas, the described aditus laryngis of body down can also be the aditus laryngis of O type, sealing surface on the aditus laryngis and the sealing surface on the spigot baffle can also be tapered.Sealing gasket on the spigot baffle also can be the soft metal.The rectangle suction port of air flue is on tapered sealing surface when taking tapered sealing surface.Spring rod and spring are arranged above the spigot baffle, and the spring rod lower end is a trip, and the spring rod top is connected with lever with chain link.The clip tenon trough that adapts with trip is arranged at following body bottom.
The automatic closed safe valve of above-mentioned combustion gas, the torsion spring torsion of described spigot baffle can also be the strength of throttle down baffle plate, be fixed with spring strut above the spigot baffle, trip is in spring strut, there are spring rod and spring in the trip upper end, the spring rod top is connected with lever with chain link, or directly is connected with bleed valve, and the clip tenon trough that adapts with trip is arranged at following body bottom.When opening valve because trip, lever and bleed valve link together with chain, so open bleed valve, treat that trip leaves clip tenon trough after, trip promptly arrives the upper limit, bleed valve was also just opened spigot baffle when being screwed to.
The automatic closed safe valve of above-mentioned combustion gas, described cut-off valve can also be to be the device of one by gate valve baffle plate and bleed valve, it by gate valve baffle plate, screw rod, barrel, spring, lever, trip, push rod, valve body, blind nut, runner shaft, and runner form, valve body is installed in the upper body top, be combined with runner shaft in the valve body, the barrel of useful spline combination in the cavity of runner shaft lower end, screw rod is combined in the barrel, and the screw rod lower end is connected with spigot baffle.The sealing gasket that the upper end of valve body is combined with blind nut and compresses with blind nut, there is the O RunddichtringO runner shaft and blind nut anastomosis, and there is runner on the top.Spigot baffle could the closed disconnected track that cuts after aditus laryngis sealing surface outer rim respectively has the control valve baffle plate to put in place.Push rod is combined in upper body abdominal cavity and the push-rod hole that the starter gate valve cylinder communicates, the front end of push rod withstands on the piston of starter gate valve, and the rear end withstands on bar bar upper end, is combined on the engaging lug of upper body with bearing pin in the middle of the lever and does fulcrum, the lower end is through in the hole of trip, and there is spring the trip rear end.
The automatic closed safe valve of above-mentioned combustion gas, described body two ends down are the screw threads that are connected with duct end, and the centre is O die cavity underpressure chamber, and the underpressure chamber front end has the plunger compartment, and the promising lever in middle part is made the attachment post of fulcrum.There is the intake duct outlet of leading to suction port on the top in the plunger compartment, and a side is the decompression air flue suction port that leads to the underpressure chamber.Plunger is combined in the plunger compartment, and there is the sealing plug on the top on the plunger, and there is the two seals groove at the middle part, and there is the ring shaped slot that is connected with the lever jaw lower end.The jaw fork of lever one end is in the ring shaped slot of plunger, intermediate support is other to be had and the sealing plug that reduces pressure air flue air outlet closure, axis hole penetrates bearing pin and lives in the connection that screw is combined in valve body, forms fulcrum, and the other end long shape hole combines with the ring shaped slot of diaphragm central screw.Diaphragm is combined in down between body and the last upper body and uses screw in compression.Spring is arranged in the upper body, and spring one end withstands on the backing plate, and the other end compresses with gland.Handle passes gland and combines with the screw at diaphragm center.It is to collect decompression and close two kinds of functions automatically the pipe network terminal security equipment that is one.
The automatic closed safe valve of above-mentioned combustion gas, the screw thread that described down body two ends are connected with duct end can be the joint that connects with gas tank and flexible pipe respectively, the plunger compartment is inverted, the top below.The top below intake duct air outlet, plunger compartment in the side, decompression air flue suction port is on the top.The upper end of plunger is the spring with the plug screw combination, and there are clip tenon trough, guide slot and three seals groove in the plunger middle part.Trip stretches to the underpressure chamber from the plunger compartment, and the angle of elongated inclined hole and lever rear end combines, and is used for when underpressure chamber pressure descends trip being pulled out, and decontrols plunger and closes source of the gas.Handle also can be to become pole poked type in the back upper place, plunger compartment on top, plunger compartment, uses axle in conjunction with on the body in the middle of the driving lever, and the outside seals with sheet rubber, and insert in the slotted eye of plunger upper end the inner end, presses down driving lever during use.
Adopt the automatic closed safe valve of combustion gas of said structure, can be when accidents such as conveyance conduit generation leakage, utilize throughput to increase, when flow velocity is accelerated, lower chamber pressure below the diaphragm reduces, upper gas chamber pressure increases, and diaphragm starts downwards automatically closes the automatic closed safe valve of combustion gas, thereby at very first time internal cutting off source of the gas.Be connected in the automatic closed safe valve of combustion gas of duct end, can when indoor having an accident, cut off the source of the gas in the inlet chamber automatically.In order to avoid cause personal injury and property loss.Be a kind of safety installation in gas pipeline conveying and other harmful gas line transportation.
Description of drawings:
Below in conjunction with accompanying drawing, the utility model is done further auspicious stating by example.
Accompanying drawing 1 is an overall structure schematic representation of the present utility model;
Accompanying drawing 2 is the spring of starter gate valve structural representations when being placed on lower end in the starter gate valve cylinder and establishing piston in air chamber;
Accompanying drawing 3 is the structural representations when adopting the gate valve baffle plate;
Accompanying drawing 4 is the annex detector schematic representation that are used to detect the utility model performance;
Accompanying drawing 5 is the utility model valve overall structure schematic representation when being connected in the pipe network terminal;
Accompanying drawing 6 is the utility model inverted structural representations of valve piston when being connected in the pipe network terminal.
Referring to accompanying drawing 1, the automatic closed safe valve of present embodiment combustion gas below is a body 1 down, two ends connect with gas pipeline, there is the tapered mouth closed mutually with the non-return baffle plate conical surface preceding lower end, and tapered mouthful of back is two ends are formed the U type inwards gradually by the O type cavity, there is the U type aditus laryngis 39 less than pipeline drift diameter the centre, there is the sealing surface with 43 effects of valve plate washer the back of aditus laryngis, and fluted on the sealing surface, the power air flue 40 that leads to the cut-off valve cylinder is arranged at the top of groove.In order to ventilate fast on than small size, the air flue 40 that is located in the sealing surface groove groove is rectangle.There is anti-aeration plate 37 aditus laryngis 39 fronts, are extended with the fixed angles of fixing spring below.
The top of upper body 17 has to be used for providing the cylinder of power to throttle down baffle plate 43, studs with cylinder sleeve 16 in the cylinder, and the cylinder front end has and leads to the air flue 20 that starts in the valve barrel, and there is the air vent of being convenient to piston motion the rear end.Piston sleeve 15 is set on the piston 14, and piston sleeve 15 cylindricals have the three seals groove, and there is the ball-type groove at piston 14 centers, is combined in the ball-type groove of piston 14 with the bulb of pressing plate 13 with piston rod 10.Piston rod 10 passes from the hole of the pressure spiral shell 12 that is combined in rear end of the cylinder block, in order to make piston rod movement flexibly and reduce friction, is cast with bearing metal in the hole inner groovy of pressing spiral shell 12.Press the seal ring of the back of spiral shell 12 to compress with little pressure spiral shell 11, there is cushion rubber bumper the front.Piston rod 10 withstands in the upper end ball-type groove of lever 9 after passing and pressing spiral shell.The middle part usefulness bearing pin of lever 9 combines with the engaging lug on the upper body 17 and forms fulcrum, the bent angle of lower end is pressed on the slideway of valve plate washer 43, there is the engaging lug that connects chain 7 front, is connected with chain 7 with bearing pin, and the other end of chain 7 is connected with the taper of bleed valve 5.Spigot baffle 43 usefulness bearing pins are combined on the engaging lug of upper body 17, and are furnished with torsion spring 41.There are slideway and grab in spigot baffle 43 tops, and the trip 42 that combines on grab and the upper body cooperates fixed valve baffle plates 43.Non-return baffle plate 35 usefulness bearing pins are combined on the engaging lug of upper body 17, and bearing pin is fixed with check ring.
Bleed valve with screw thread be combined in upper body back bonnet 8 above, threaded taper 5 is arranged in the bleed valve, the conical surface effect confining gas of taper 5 and valve body 6, runner shaft 4 passes blind nut 3, and is fixed by blind nut 3; Runner shaft 4 has O RunddichtringO and sealing gasket with blind nut 3 anastomosis, and there is runner 2 on the top.
Referring to accompanying drawing 2, when the spring of embodiment's starter gate valve is placed on the interior lower end of starter gate valve cylinder and establishes piston in air chamber, the device that starter gate valve upper gas chamber and diaphragm can be made up of cylinder and piston, when taking cylinder and piston, piston rod passes the back at piston center hole and fixes with nut, spring is the lower end in the starter gate valve cylinder, takes in starter gate valve cylinder lower end can deduct fixed angles and spring and adjust the influence of spiral shell to air-flow in conjunction with spring.
Referring to accompanying drawing 3, embodiment's gate valve baffle plate, spigot baffle is to be the device of one with bleed valve, it by spigot baffle 43, screw rod 44, barrel 46, spring 45, lever 50, trip 52, push rod 51, blind nut 48, runner shaft 47, and runner 49 form, valve body 6 is installed in upper body 17 tops, be combined with runner shaft 47 in the valve body 6, the barrel 46 of useful spline combination in the cavity of runner shaft lower end.Screw rod 44 is combined in the barrel, and screw rod 44 lower ends are connected with spigot baffle 43.The sealing gasket that the upper end of valve body 6 is combined with blind nut 48 and compresses with blind nut, runner shaft 47 has the O RunddichtringO with blind nut 48 anastomosis, and there is runner 49 on the top.Spigot baffle could the closed disconnected track that cuts after aditus laryngis sealing surface outer rim respectively has the control valve baffle plate to put in place.Starter gate valve piston 25 lower ends are tapered, push rod 51 is combined in upper body abdominal cavity and the push-rod hole that the starter gate valve cylinder communicates, the front end of push rod withstands on tapered of the starter gate valve piston lower end, the rear end withstands on lever 50 upper ends, be combined on the engaging lug of upper body with bearing pin in the middle of the lever and do fulcrum, the lower end is through in the hole of trip 52, and there is spring the trip rear end.
Referring to accompanying drawing 4, embodiment's annex detector, screw rod 53 are combined in the sleeve 55, and an end of screw rod 53 has the screw thread that combines with starter gate valve piston 25 top screws in use, and the other end is useful on the scale and the operation handle of detection springs 34 pressure.One end of sleeve 55 has the screw thread that combines with starter gate valve gland 23 in use, and blind nut 54 is combined on the screw thread of sleeve 55 the other ends.
Referring to accompanying drawing 5, valve when embodiment is connected in the pipe network terminal is collection decompression and the valve of closing automatically to one, the two ends of following body 1 are the screw threads that connects with the gas line network terminal, the centre is O die cavity underpressure chamber, there is the plunger compartment rear end in the chamber, there is the air outlet of leading to intake duct on the last top of plunger compartment, and the side is the suction port that leads to the decompression air flue of underpressure chamber.Plunger (56) is combined in the plunger compartment, and there is the sealing plug upper end, and the lower end is the ring shaped slot that combines with lever, and there is the two seals groove at the middle part.Diaphragm 31 is combined in down between body 1 and the upper body 17, and diaphragm 31 belows are underpressure chamber.Combine the formation fulcrum with bearing pin with connecting column on the following body 1 in the middle of the lever in the underpressure chamber, the ring shaped slot of plunger (56) lower end in the jaw of lever rear end and the plunger compartment combines, and the long shape hole of front end combines with the screw ring shaped slot at diaphragm 31 centers.Backing plate and the spring that is combined in the upper body 17 are arranged above the diaphragm 31, and upper body 17 top glands are with spring compression.Handle passes gland and combines with the screw at diaphragm 31 centers.
Referring to accompanying drawing 6, the valve piston chamber when embodiment is connected in the pipe network terminal is inverted, the top below, intake duct air outlet, plunger compartment is in the side, decompression air flue suction port is on the top.The last top of plunger 56 has in conjunction with the screw of handle with the spring of plug screw combination, and there are clip tenon trough, guide slot and three seals groove in plunger 56 middle parts.Trip stretches to the underpressure chamber from the plunger compartment, and the angle of elongated inclined hole and lever rear end combines, and is used for when underpressure chamber pressure descends trip being pulled out, and decontrols plunger and closes source of the gas.Handle is combined in top on the plunger, also can be to become pole poked type in the back upper place, plunger compartment, is combined on the upper body with axle in the middle of the driving lever, and the outside seals with sheet rubber, and insert in the slotted eye of plunger 56 upper ends the inner end, presses down driving lever during use.
The utility model embodiment working procedure is as follows:
When gas pipeline generation leakage accident, descend rapidly near the air pressure in the accident place pipeline, airspeed is accelerated, and particularly air-flow flow velocity under the aditus laryngis effect at the aditus laryngis place of the automatic closed safe valve of installing near the accident place of combustion gas is faster.During flow velocity when flow velocity surpasses normal the use, under the effect of air-flow at anti-aeration plate of the unexpected speedup in aditus laryngis place, the air pressure of anti-aeration plate back increases, and air communication is crossed air flue 38 and entered upper gas chamber, and the pressure of upper gas chamber begins to increase.Lower chamber air pressure below the diaphragm of anti-aeration plate front reduces simultaneously, and the fast more upward lower chamber pressure reduction of airspeed is just big more.(because spring 34 is the pressure design during by normal gas transmission) to push away diaphragm 31 downward so enter gas pressure that upper gas chamber increases, and pressure spring 34, starter gate valve piston 25 are closed the outlet of air flue 22 lower ends downwards, also opened air flue 40 simultaneously.The gas of aditus laryngis 39 back enters air flue 40, enters the cut-off valve cylinder by starter gate valve cylinder upper and air flue 20.The gas that enters the cut-off valve cylinder promotes piston 14 backward, and the gas of piston back is discharged from the air flue of cylinder back and entered the venting road.The upper end of piston rod 10 top levers 9 when piston is backward, the lower end is dialled trip 42 pressure spring inwards forward, and trip 42 is freed the grab on the spigot baffle 43, and simultaneously, it is downward that the bent angle of lever 9 presses down spigot baffle.When spigot baffle dropped to above the aditus laryngis upper edge, the air-flow that flows to aditus laryngis promoted spigot baffle and closes whole air-flows, has also closed air flue 40 simultaneously.Thereby finished the work of cutting off source of the gas.
The automatic closed safe valve of combustion gas that is installed in the accident downstream is not when combustion gas has had pressure to begin to reflux, and the non-return baffle plate falls, and cuts off the combustion gas that refluxes.
The starter gate valve of the automatic closed safe valve of combustion gas when aditus laryngis front end air pressure tends to be steady, sets back under spring action automatically.Simultaneously also just open pent air flue 22, closed the air flue 40 that air pressure is provided for the cut-off valve cylinder.After pipeline rehabilitation, when ventilating again.At first, twist bleed valve runner 2, runner shaft 4 rotates, and the taper 5 in the valve body leaves tapered of valve body under threaded function, open bleed valve.The gas of aditus laryngis back flows to the aditus laryngis front by venting road 29.The chain 7 tie-bar bars 9 that taper awl end connects, lever 9 upper end push piston bars 10 inwards, piston recovers the origin-location.Simultaneously gas stream during through venting road 29 because suction, the gas in cut-off valve cylinder front and the starter gate valve enters starter gate valve cylinder lower end through air flue 22, in the outlet that enters the venting road through air flue 26.Played and forced the ram piston to recover the effect of position, source.In U type aditus laryngis 39 two ends air pressure spigot baffle 43 position, recovery source under torsion spring 41 effects during near balance, top grab is blocked by trip 42, twists the bleed valve runner and closes bleed valve.For following task is prepared.Again the non-return baffle plate 35 that is in accident downstream " the automatic closed safe valve of combustion gas " after the ventilation starts forward under the air-flow effect.
Working procedure is when using gate valve baffle plate (accompanying drawing 3): the awl inclined-plane, lower end of piston press push rod 51 inwards at starter gate valve piston 25 downwards the time, push rod pushing lever 50 upper ends backward, the lever lower end is dialled trip 52 pressure spring and free the gate valve baffle plate inwards forward, spigot baffle is under spring action, close source of the gas downwards, because spigot baffle is tapered the cooperation with baffle plate groove, spigot baffle respectively has the disconnected track that cuts that adapts with aditus laryngis sealing surface outward edge, closely cooperates with the aditus laryngis sealing surface after spigot baffle puts in place.
When recovering ventilation, twist wheel, the runner shaft lower end makes barrel rotate under the spline effect, and screw rod makes progress, and spigot baffle upwards recovers ventilation, treats that spigot baffle rises when putting in place, and trip outwards blocks spigot baffle under spring action.Then the runner revolution is put in place.
Valve embodiment's working procedure was as follows when the utility model was connected in the pipe network terminal:
At the outdoor pipeline generation break accident that leads to indoor cooking stove, surpass when normally using throughput.Underpressure chamber air pressure descends below the diaphragm 31, and it is downward that spring pushes away diaphragm, and the screw at diaphragm center presses the lever front end downward, and the rear end upwards pushes away plunger 56 upwards, and the sealing plug of plunger top upwards seals the air outlet of intake duct, cuts off to lead to indoor source of the gas.
When recovering ventilation, handle upwards to be mentioned less, the screw belt lever front end at diaphragm 31 centers makes progress, and it is downward that the rear end pulls down plunger 56, and the sealing plug of plunger top leaves the suction port of intake duct, and combustion gas enters the underpressure chamber.When underpressure chamber air pressure reached certain pressure, the diaphragm pressure spring that makes progress was located at the air outlet of the other sealing plug sealing decompression air flue of fulcrum, and the air pressure of underpressure chamber is not increasing.When using combustion gas, underpressure chamber air pressure descends, and downwards, the other sealing plug of fulcrum leaves the air outlet combustion gas of decompression air flue and enters the underpressure chamber diaphragm under spring action.So perseveration plays decompression.
Claims (9)
1. the automatic closed safe valve of combustion gas, it comprises upper body (17), following body (1), starter gate valve, cut-off valve, bleed valve and annex detector, it is characterized in that: following body (1) two ends connect with gas pipeline, front end has the tapered mouth closed with non-return baffle plate (35), tapered mouthful back is that the interior cavity by the O type forms the U type aditus laryngis (39) less than the gas pipeline latus rectum backward gradually, U type aditus laryngis (39) back is closed mutually with spigot baffle (43), the sealing surface that has groove of shutoff source of the gas, the rectangle air flue is arranged in the sealing surface upper grooves, combine with upper body and to form one and complete provide power air flue (40) for throttle down, there is anti-aeration plate (37) U type aditus laryngis front, there is air flue (38) anti-aeration plate (37) back, and the fixed angles of fixing spring is arranged under the anti-aeration plate; Upper body (17) is the main part in addition that each parts is installed, there is non-return baffle plate engaging lug its front end below, non-return baffle plate (35) is installed in bearing pin on the engaging lug of the preceding lower end of upper body (17), and tapered with the tapered mouthful closure of following body (1) front end arranged on the non-return baffle plate, sealing gasket is arranged on tapered; The cylinder sleeve of starter gate valve (21) is set in the cylinder, piston (25) is in cylinder sleeve (21), piston sleeve (24) is set on the piston (25), respectively there is the two seals groove at the two ends of piston sleeve (24), piston (25) lower end is the piston rod that is coated with the corrosion resistant layer, piston rod passes in the following hole and enters air chamber, be combined in diaphragm (31) center between the body (1) under the upper body (17), clamp with nut with each pad up and down and to compress, form upper gas chamber (30) and lower chamber (33), be combined with check ring (36) on the piston rod, the spring on top (34) withstands on the fixed angles, for activity flexible, be cast with bearing metal in the hole inner groovy that piston rod passes, in conjunction with the screw of annex detector screw rod (53), cylinder had gland (23) topmost when the last top of piston (25) had for the detection maintenance, the detection hole that combines with the sleeve (55) of annex detector when having on it for detection, this hole adds the sealing gasket sealing with plug screw (19) at ordinary times; The cylinder sleeve of cut-off valve (16) is set in the cylinder, piston (14) outside combines with piston sleeve (15), the cylindrical of piston sleeve (15) has the three seals groove, there is the ball-type groove at the piston center, the bulb of piston rod (10) is combined in the ball-type groove of piston with pressing plate (13), after piston rod passes the hole of the pressure spiral shell (12) that is combined in the cylinder rear end, withstand in the ball-type groove of lever (9) upper end, be cast with the bearing metal that is used to reduce friction in the hole inner groovy of pressure spiral shell (12), the front is useful on the rubber cushion that plays buffer function when piston puts in place, the useful little pressure spiral shell in back (11) is pressed on the sealing gasket on the spiral shell (12), lever (9) is installed in the abdominal cavity of upper body (17), attachment hole in the middle of the lever (9) is connected with bearing pin with the engaging lug of upper body (17), form fulcrum, bearing pin is fixed with check ring, prevent that bearing pin from deviating from, the bent angle of lever (9) lower end, be pressed on the slideway of spigot baffle (43), the chain lug of lever back links together chain (7) with bearing pin, bearing pin is fixed with check ring, spigot baffle (43) adds on the engaging lug that torsion spring (41) is fixed on upper body (17) lower end with bearing pin, slideway and grab are arranged above, with the fixing seal rubber pad of the following useful dovetail groove of aditus laryngis closure, trip (42) is combined in the clip tenon trough; The cylinder front end has the air flue (20) that leads to the starter gate valve upper end, the rear end is useful on reduces the air flue that cylinder rear portion pressure leads to the road of exitting, there is the air flue (40) that leads to U type aditus laryngis (39) sealing surface groove at starter gate valve cylinder middle part, the air flue (22) that leads to the bottom from top is arranged between front cylinder sleeve and the cylinder body, with lead to from the bottom venting road (29) air flue (26), sleeve (28) is arranged in the air flue (26), be combined with the steel ball (27) and the spring that are used to prevent return-air in the sleeve (28), the outer end is fixed with the pressure spiral shell, upper gas chamber has the air flue (38) that leads to anti-aeration plate (37) back, with the air flue (32) that leads to venting road (29), be provided with the adjustment screw of adjusting the upper gas chamber gas output in the air flue (32), outside plug screw shutoff; There is easy-to-mount window upper body (17) back, bonnet (8) adds on the rear hatch that sealing gasket is fixed on upper body (17), bleed valve uses scyewed joint in the screw of bonnet (8), the conical surface that matches with taper (5) and the internal thread that combines with the screw thread of taper (5) are arranged in the valve body (6), there is the outside thread that combines with blind nut (3) outside, taper (5) is combined on the interior screw thread of valve body (6) with screw thread, taper vertex of a cone end is connected with chain (7), runner shaft (4) is combined in the rear end of valve body (6) with blind nut (3), the rectangle groove of runner shaft one end rectangular plate and taper coincide, the outer end is combined with runner (2), runner shaft (4) has O RunddichtringO and sealing gasket with blind nut (3) anastomosis, the lug of valve body connects with the venting road lug of upper body (17), upper body (17) forms an automatic closed safe valve of complete combustion gas in following body 1 sealed attachment; The annex detector, in use, its sleeve (55) combines with the gland (23) on starter gate valve top, and blind nut (54) is combined in screw rod (53) in the sleeve (55), and the screw thread of screw rod (53) combines with starter gate valve piston rod (26) top screw.
2. the automatic closed safe valve of combustion gas according to claim 1, it is characterized in that: described starter gate valve, parallel with the cut-off valve cylinder, take the lower chamber (33) of the starter gate valve of parallel placement and spring in the forefront of upper body, the spring front end is to adjust spiral shell.
3. the automatic closed safe valve of combustion gas according to claim 1, it is characterized in that: described starter gate valve spring (34) is in the upper gas chamber (30) of diaphragm (31) top, starter gate valve piston (25) lower end is tapered, push rod (51) one ends withstand on the tapered inclined-plane, the other end withstands on the upper end of lever (50), lever (50) lower end is through in the groove at trip (52) middle part, and trip (52) one ends have spring, and the other end blocks spigot baffle.
4. the automatic closed safe valve of combustion gas according to claim 1, it is characterized in that: described starter gate valve air chamber and diaphragm are made up of cylinder and piston, spring (34) is the lower end in the starter gate valve cylinder, the lower end of the piston rod of piston (25) is passed piston center hole and is fixed with nut, and air flue (38) is to lead to air flue (40) from upper gas chamber.
5. the automatic closed safe valve of combustion gas according to claim 1, it is characterized in that: described aditus laryngis (39) is the O type, the closing face of sealing surface on the aditus laryngis and the spigot baffle closed with it (43) is tapered, and the seal rubber pad of spigot baffle (43) is the soft metal.
6. the automatic closed safe valve of combustion gas according to claim 1, it is characterized in that: the torsion of the torsion spring (41) of described spigot baffle (43) is the strength of throttle down baffle plate, be fixed with spring strut above the spigot baffle, trip is in spring strut, there are spring rod and spring in the trip upper end, the spring rod top is connected with lever (9) with chain link, or directly is connected with bleed valve, and the clip tenon trough that adapts with trip is arranged at following body (1) bottom.
7. according to claim 1 or the automatic closed safe valve of 6 described combustion gas, it is characterized in that: described spigot baffle is a flashboard type, valve body (6) is combined on the upper body (17), runner shaft (47) adds sealing gasket with blind nut (48) and the O RunddichtringO is combined in the valve body, screw rod (44) the upper end barrel (46) interior be combined in runner shaft (47) with spline combines, there is spring (45) centre, the lower end combines with spigot baffle, what spigot baffle ability after aditus laryngis sealing surface outer rim respectively has the control valve baffle plate to put in place was closed breaks every track, push rod (52) is combined in the push-rod hole of upper body (17), front end withstands on the awl inclined-plane of starter gate valve piston (25), the rear end withstands on the lever upper end, be combined on the engaging lug of upper body (17) with bearing pin in the middle of the lever, the lower end combines with hole on the trip that is combined in upper body (17), spring is arranged in the trip, and when adopting the cylinder of aerodynamic force and gate valve baffle-type simultaneously, the gate valve baffle plate is that the upper end is sweptback.
8. the automatic closed safe valve of combustion gas according to claim 1, it is characterized in that: it is that the pipe network terminal is closed automatically and reduced pressure and is the valve of one, there is the screw thread that connects with gas pipeline at the two ends of following body (1), the centre is O die cavity underpressure chamber, front end has post match chamber, the top is the air outlet of intake duct in the plunger compartment, and the side is the decompression air flue suction port that leads to the underpressure chamber; Plunger (56) is combined in the plunger compartment, the upper end is the sealing plug, the lower end is the ring shaped slot that combines with lever, there is the two seals groove at the middle part, diaphragm (31) is combined in down between body (1) and the upper body (17), lever in the underpressure chamber, diaphragm below combines with the connecting column of following body (1) with bearing pin and forms fulcrum, balance pivot one side is the sealing plug, the rear end jaw combines with plunger (56) lower end ring shaped slot in the plunger compartment, and the long shape hole of front end combines with the screw lower end ring shaped slot at diaphragm (31) center; On the backing plate, the other end compresses with the gland that is combined in upper body (17) top spring in the upper body (17) on diaphragm (31), and handle passes gland and combines with the screw at diaphragm center.
9. right 1 or the automatic closed safe valve of 8 described combustion gas as requested, it is characterized in that: the two ends of following body are the coupling heads that is connected with flexible pipe with gas tank, plunger is inverted, the suction port of plunger compartment's intake duct is located at top one side under the plunger compartment, the decompression air flue suction port that leads to the underpressure chamber is on following top, the plunger upper end is a spring, the lower end is the sealing plug, there is guide slot at the plunger middle part, clip tenon trough and three seals groove, trip stretches to the underpressure chamber from the plunger compartment, the elongated inclined hole of trip combines with the angle on the lever, and tommy bar is combined in the place ahead, plunger compartment one side, and the inner end is in the tommy bar groove of plunger compartment, the centre is combined on the body with axle, the outside seals with sheet rubber, and when adopting handle, the plug screw that handle passes the top combines with plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201254778U CN201078575Y (en) | 2007-08-01 | 2007-08-01 | Safety valve for gas automatic closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201254778U CN201078575Y (en) | 2007-08-01 | 2007-08-01 | Safety valve for gas automatic closing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201078575Y true CN201078575Y (en) | 2008-06-25 |
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ID=39570637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201254778U Expired - Fee Related CN201078575Y (en) | 2007-08-01 | 2007-08-01 | Safety valve for gas automatic closing |
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| Country | Link |
|---|---|
| CN (1) | CN201078575Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927783A (en) * | 2016-06-30 | 2016-09-07 | 重庆市山城燃气设备有限公司 | Self-cleaning pressure regulator |
| CN107941295A (en) * | 2017-11-22 | 2018-04-20 | 重庆陆吾科技有限公司 | A kind of gas meter explosion-protection equipment simple in structure |
| CN114137156A (en) * | 2021-11-02 | 2022-03-04 | 中泸有限公司 | Air pollution degree rapid detection equipment |
-
2007
- 2007-08-01 CN CNU2007201254778U patent/CN201078575Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927783A (en) * | 2016-06-30 | 2016-09-07 | 重庆市山城燃气设备有限公司 | Self-cleaning pressure regulator |
| CN107941295A (en) * | 2017-11-22 | 2018-04-20 | 重庆陆吾科技有限公司 | A kind of gas meter explosion-protection equipment simple in structure |
| CN114137156A (en) * | 2021-11-02 | 2022-03-04 | 中泸有限公司 | Air pollution degree rapid detection equipment |
| CN114137156B (en) * | 2021-11-02 | 2023-07-25 | 中泸有限公司 | Air pollution degree short-term test equipment |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 Termination date: 20100801 |